Home / Chemicals / Pool / Water Balancers / 4# pH Increaser View cart “5lb Rapid Shock” has been added to your cart. $11.99 4# pH Increaser quantity Add to cart SKU: 84455 Categories: Chemicals, Pool, Water Balancers Product ID: 4370 Description Description Raises pH in pool water. Related products Sale! 5lb 1″ Chlorine Tablets $57.99 $54.99 Add to cart Sale! 1lb Bag of Rapid Shock $6.99 $5.99 Add to cart Sirona Chlorine/Bromine Spa Test Strips – 25 Count $15.99 Add to cart Sale! 5lb Instant Clear Chlorine Granules $51.99 $43.99 Add to cart